Soichi's Beloved Pet

A stray cat decides to follow Sayuri Tsujii home one day, and everyone in the house gets attached to her, deciding to name her Collon. But after Collon has a run-in with Sayuri's youngest brother—the gloomy, curse-happy Souichi—she begins to act strangely. Is this the result of a curse, or something else? Source: MU Included in: